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Chinese researchers develop new lithium battery withstanding - 40 C with both long endurance and explosive strength_我的网站
A | 10月15日，纪念习近平总书记文艺工作座谈会重要讲话发表10周年暨抚顺市文联成立70周年座谈会召开。
A research team led by Chen Zhongwei at the Dalian Institute of Chemical Physics under the Chinese Academy of Sciences developed a 25-ampere-hour pouch-type lithium-metal primary battery. Tests conducted by the safety laboratory of the China Electronics Standardization Institute showed that the battery achieved an energy density of more than 750 Watt-hour per kilogram at a low discharge rate, according to the report.
Meanwhile its discharge rate can be increased by up to 100 times, enabling short bursts of high-current discharge at 10C. The "C" stands for C-rate, which is the charge and discharge rates of a battery. According to sector website Battery University, the capacity of a battery is commonly rated at 1C, meaning that a fully charged battery rated at 1Ah should provide 1A for one hour. The same battery discharging at 0.5C should provide 500mA for two hours, and at 2C it delivers 2A for 30 minutes.
The new battery puts China among the world's leading players in high-power primary battery technology.
Primary batteries offer high specific energy, long storage times and instant readiness, allowing them to be used immediately even after long storage.
Primaries play an important role, especially when charging is impractical or impossible, such as in military combat, rescue missions and forest-fire services, the article said.
Traditional lithium primary batteries can store large amounts of energy for long periods, but their ability to rapidly release that energy can be limited. The new battery is designed to combine high energy density with high power output, allowing it to both operate for extended periods and provide large amounts of power when needed.
The battery can deliver short bursts of high-current discharge at up to 10C and sustain discharge at 4C. At room temperature, its specific power reaches 4,487 Watts per kilogram, according to Science and Technology Daily.
The battery also maintains strong performance under extremely cold conditions. At -40 C, the battery retains an energy density of 447 Watt-hour per kilogram at a 1C discharge rate. Its annual self-discharge rate is below 1 percent, meaning that it loses relatively little stored energy during long periods of standby.
Such characteristics could make the battery suitable for equipment that needs both long-term energy storage and sudden high-power output, including drones, robots, spacecraft and sensors deployed in remote areas.
Chen said the team achieved a breakthrough in cathode materials by developing a high-entropy oxide material and has established a pilot production line with an annual capacity of 10 tons, linking material development with battery-cell production.
The battery has passed third-party testing and is now undergoing further validation for applications including drones, robots, spaceflight simulators and field sensor nodes, according to Chen.
Global Times
。老中青三代文艺工作者齐聚一堂，回首过去激情奋斗的岁月，历数优秀的文艺家以及文艺作品，展望美好未来。 70年来，市文联引领广大文艺工作者“梅花香自苦寒来”，涌现出一大批德艺双馨的名家大家；团结广大文艺工作者“吹尽狂沙始到金”，创作推出集思想性、艺术性、人民性和时代性的优秀作品；联系广大文艺工作者“咬定青山不放松”，把握正确方向，立足自身优势，充分发挥桥梁纽带作用；组织广大文艺工作者“一枝一叶总关情”，面向基层、服务群众，开展丰富多彩的文艺文化惠民活动。
B | 市文联将旗帜鲜明坚持党的领导，筑牢文艺文联工作高质量发展的思想根基；聚精会神抓牢发展之要，培养造就更多德艺双馨的文艺名家；坚持不懈攀登文艺之峰，不断创作出无愧于时代、无愧于人民的精品力作；当仁不让担起文联之责，营造风清气正的文艺界氛围，把文联建设成为让市委放心、让人民群众满意的群团组织，为奋力谱写中国式现代化抚顺篇章贡献新力量。 责任编辑：刘春阳。
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